Groups prioritized to receive the 2009 and 2009-10 seasonal trivalent influenza vaccine (black square), 2009 monovalent pandemic influenza vaccine (black open circle), and 2010 and 2010-11 seasonal trivalent influenza vaccine (gray square) in countries located in Asia and the Pacific, and the Americas. Groups subsidized to receive the vaccine for free (f), at a cost with partial subsidy (p), with reimbursable cost (r) or insured by national health insurance (i) were also denoted. Target group abbreviations: 0-5 (0-5 years), 6-11 (6-11 years), 12-15 (12-15 years), 16-39 (16-39 years), 40-64 (40-64 years), 65+ (65 years or over), prg (pregnant), chr (chronic illness, obe (obesity), dis (disabled), hcw (health care workers), lab (laboratory workers), con (close contacts), res (care home residents), chw (care home workers), tch (teachers), ani (animal contacts), ecw (essential community workers), abo (aboriginals), trv (travelers).
Ng et al. BMC Infectious Diseases 2011 11:230 doi:10.1186/1471-2334-11-230